THE CHALLENGE

In recent years, Bridge #289’s deck and superstructure have experienced severe deterioration resulting in a posted weight restriction of five tons. The existing bridge had a 12-foot curb-to-curb width that carried two lanes of traffic across Indian Creek. The superstructure was in overall serious condition with severely deteriorated concrete with exposed reinforcing steel visible throughout the underside of the deck.

HOW WE HELPED

McCormick Taylor provided engineering design services, construction consultation, and construction inspection for the reconstruction of Bridge #289. The proposed bridge will have a span of approximately 40 feet with a cartway width of 26 feet, including two 11-foot lanes and two 2-foot shoulders.

McCormick Taylor anticipates the use of the NEXT Beam, which is a precast double-tee beam with a 13-foot-wide tee leg—a cost-effective solution for this project. The existing vertical alignment, when combined with the low existing clearance of approximately five feet, limits the alternatives that can be utilized at this location. Residential properties are present in close proximity to the structure and further limit any considerable adjustments to the roadway profile.

RESULTS

Construction is currently underway on the bridge. The proposed alternative will raise the vertical profile of the roadway slightly to maintain the existing low chord of the bridge to preserve the current hydraulic opening. The existing horizontal alignment will be maintained with only minor modifications to tie-in the new bridge deck and roadway approaches. At least one sidewalk will be incorporated into the design of the new structure.

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